﻿using System;
using System.Collections;
using System.Collections.Specialized;
using System.Data;
using System.Data.SqlClient;
using System.Data.OleDb;
using MySql.Data.MySqlClient;
//using System.Data.OracleClient;
using System.Configuration;
using System.Reflection;
 
namespace SystemFramework.DAL
{
    /**//// <summary>
    /// All rights reserved
    /// 数据访问基础类
    /// 用户可以修改满足自己项目的需要。
    /// </summary>
    public class DataBaseLayer 
    {
        //数据库连接字符串(web.config来配置)
        //<add key="ConnectionString" value="server=127.0.0.1;database=DATABASE;uid=sa;pwd=" />        
        private string connectionString;
        public string ConntionString 
        {
            get
            {
                return connectionString ; 
            }
            set
            {
                connectionString = value;
            }
        }
 
 
        public DataBaseLayer(string strConnect,string dataType)
        {            
            this.ConntionString = strConnect;
            this.DbType = dataType;
        }
 
 
        public DataBaseLayer()
        {
            this.connectionString = ConfigurationSettings.AppSettings["ConnectionString"] ;
            this.dbType = ConfigurationSettings.AppSettings["DataType"] ;
        }
 
        /**//// <summary>
        /// 数据库类型 
        /// </summary>
        private string dbType;
        public string DbType
        {
            get
            {
                if ( dbType == string.Empty || dbType == null )
                {
                    return "Access";
                }
                else
                {
                    return dbType;
                }
            }
            set 
            {
                if ( value != string.Empty  &&  value != null )
                {
                    dbType = value;
                }
                if (dbType ==string.Empty || dbType == null)
                {
                    dbType = ConfigurationSettings.AppSettings["DataType"];
                }
                if ( dbType == string.Empty || dbType == null )
                {
                    dbType = "Access";
                }
            }      
        }
 
 
 
         
        #region 转换参数
        private System.Data.IDbDataParameter iDbPara(string ParaName,string DataType)
        {
            switch(this.DbType)
            {
                case "SqlServer":
                    return GetSqlPara(ParaName,DataType);
 
                case "Oracle":
                    return GetOleDbPara(ParaName,DataType);
 
                case "Access":
                    return GetOleDbPara(ParaName,DataType);
 
                default :
                    return GetSqlPara(ParaName,DataType);
 
            }
        }
 
        private System.Data.SqlClient.SqlParameter  GetSqlPara( string ParaName , string DataType)
        {
            switch(DataType)
            {
                case "Decimal":
                    return  new System.Data.SqlClient.SqlParameter ( ParaName, System.Data.SqlDbType.Decimal );
                case "Varchar":
                    return new System.Data.SqlClient.SqlParameter ( ParaName, System.Data.SqlDbType.VarChar );
                case "DateTime":
                    return new System.Data.SqlClient.SqlParameter ( ParaName, System.Data.SqlDbType.DateTime );
                case "Iamge":
                    return new System.Data.SqlClient.SqlParameter ( ParaName, System.Data.SqlDbType.Image );
                case "Int":
                    return new System.Data.SqlClient.SqlParameter ( ParaName, System.Data.SqlDbType.Int );
                case "Text":
                    return new System.Data.SqlClient.SqlParameter ( ParaName, System.Data.SqlDbType.NText );
                default :
                    return new System.Data.SqlClient.SqlParameter ( ParaName, System.Data.SqlDbType.VarChar );
            }
        }
 
        //private System.Data.OracleClient.OracleParameter  GetOraclePara( string ParaName , string DataType)
        //{
        //    switch(DataType)
        //    {
        //        case "Decimal":
        //            return  new System.Data.OracleClient.OracleParameter( ParaName, System.Data.OracleClient.OracleType.Double);
     
        //        case "Varchar":
        //            return  new System.Data.OracleClient.OracleParameter ( ParaName, System.Data.OracleClient.OracleType.VarChar );
 
        //        case "DateTime":
        //            return  new System.Data.OracleClient.OracleParameter ( ParaName, System.Data.OracleClient.OracleType.DateTime );
 
        //        case "Iamge":
        //            return  new System.Data.OracleClient.OracleParameter ( ParaName, System.Data.OracleClient.OracleType.BFile );
 
        //        case "Int":
        //            return  new System.Data.OracleClient.OracleParameter ( ParaName, System.Data.OracleClient.OracleType.Int32 );
 
        //        case "Text":
        //            return  new System.Data.OracleClient.OracleParameter ( ParaName, System.Data.OracleClient.OracleType.LongVarChar );
 
        //        default:
        //            return  new System.Data.OracleClient.OracleParameter ( ParaName, System.Data.OracleClient.OracleType.VarChar );
 
        //    }
        //}
 
        private System.Data.OleDb.OleDbParameter  GetOleDbPara( string ParaName , string DataType)
        {
            switch(DataType)
            {
                case "Decimal":
                    return  new System.Data.OleDb.OleDbParameter( ParaName, System.Data.DbType.Decimal);
 
                case "Varchar":
                    return  new System.Data.OleDb.OleDbParameter ( ParaName, System.Data.DbType.String );
 
                case "DateTime":
                    return  new System.Data.OleDb.OleDbParameter ( ParaName, System.Data.DbType.DateTime );
 
                case "Iamge":
                    return   new System.Data.OleDb.OleDbParameter( ParaName, System.Data.DbType.Binary );
 
                case "Int":
                    return  new System.Data.OleDb.OleDbParameter ( ParaName, System.Data.DbType.Int32 );
 
                case "Text":
                    return  new System.Data.OleDb.OleDbParameter ( ParaName, System.Data.DbType.String );                    
 
                default:
                    return  new System.Data.OleDb.OleDbParameter ( ParaName, System.Data.DbType.String );
 
            }
        }
 
        #endregion
         
        #region 创建 Connection 和 Command 
        private IDbConnection GetConnection()
        {
            switch(this.DbType)
            {
                case "SqlServer":
                    return new System.Data.SqlClient.SqlConnection(this.ConntionString);
 
                //case "Oracle":
                //    return new System.Data.OracleClient.OracleConnection(this.ConntionString);
                case "MySql":
                    return new MySql.Data.MySqlClient.MySqlConnection(this.ConntionString);

                case "Access":
                    return new System.Data.OleDb.OleDbConnection(this.ConntionString);
                default:
                    return new System.Data.SqlClient.SqlConnection(this.ConntionString);
            }
        }
 
         
        private IDbCommand GetCommand(string Sql,IDbConnection iConn)
        {
            switch(this.DbType)
            {
                case "SqlServer":
                    return new System.Data.SqlClient.SqlCommand(Sql,(SqlConnection)iConn);
 
                //case "Oracle":
                //    return new System.Data.OracleClient.OracleCommand(Sql,(OracleConnection)iConn);
                case "MySql":
                    return new MySql.Data.MySqlClient.MySqlCommand(Sql,(MySqlConnection)iConn);

                case "Access":
                    return new System.Data.OleDb.OleDbCommand(Sql,(OleDbConnection)iConn);
                default:
                    return new System.Data.SqlClient.SqlCommand(Sql,(SqlConnection)iConn);
            }    
        }
 
        private IDbCommand GetCommand()
        {
            switch(this.DbType)
            {
                case "SqlServer":
                    return new System.Data.SqlClient.SqlCommand();
 
                //case "Oracle":
                //    return new System.Data.OracleClient.OracleCommand();
                case "MySql":
                    return new MySql.Data.MySqlClient.MySqlCommand();

                case "Access":
                    return new System.Data.OleDb.OleDbCommand();
                default:
                    return new System.Data.SqlClient.SqlCommand();
            }    
        }
 
        private IDataAdapter GetAdapater(string Sql,IDbConnection iConn)
        {
            switch(this.DbType)
            {
                case "SqlServer":
                    return new System.Data.SqlClient.SqlDataAdapter(Sql,(SqlConnection)iConn);
 
                //case "Oracle":
                //    return new System.Data.OracleClient.OracleDataAdapter(Sql,(OracleConnection)iConn);
                case "MySql":
                    return new MySql.Data.MySqlClient.MySqlDataAdapter(Sql,(MySqlConnection)iConn);
 
                case "Access":
                    return new System.Data.OleDb.OleDbDataAdapter(Sql,(OleDbConnection)iConn);
 
                default:
                    return new System.Data.SqlClient.SqlDataAdapter(Sql,(SqlConnection)iConn);;
            }
             
        }
 
        private IDataAdapter GetAdapater()
        {
            switch(this.DbType)
            {
                case "SqlServer":
                    return new System.Data.SqlClient.SqlDataAdapter();
 
                //case "Oracle":
                //    return new System.Data.OracleClient.OracleDataAdapter();
                case "MySql":
                    return new MySql.Data.MySqlClient.MySqlDataAdapter();
 
                case "Access":
                    return new System.Data.OleDb.OleDbDataAdapter();
 
                default:
                    return new System.Data.SqlClient.SqlDataAdapter();
            }
        }
 
        private IDataAdapter GetAdapater(IDbCommand iCmd)
        {
            switch(this.DbType)
            {
                case "SqlServer":
                    return new System.Data.SqlClient.SqlDataAdapter((SqlCommand)iCmd);
 
                //case "Oracle":
                //    return new System.Data.OracleClient.OracleDataAdapter((OracleCommand)iCmd);
                case "MySql":
                    return new MySql.Data.MySqlClient.MySqlDataAdapter((MySqlCommand)iCmd);

                case "Access":
                    return new System.Data.OleDb.OleDbDataAdapter((OleDbCommand)iCmd);
 
                default:
                    return new System.Data.SqlClient.SqlDataAdapter((SqlCommand)iCmd);
            }
        }
        #endregion
 
        #region  执行简单SQL语句
        /**//// <summary>
        /// 执行SQL语句，返回影响的记录数
        /// </summary>
        /// <param name="SQLString">SQL语句</param>
        /// <returns>影响的记录数</returns>
        public int ExecuteSql(string SqlString)
        {
            using (System.Data.IDbConnection  iConn = this.GetConnection())
            {                
                using (System.Data.IDbCommand iCmd  = GetCommand(SqlString,iConn))
                {
                    iConn.Open();
                    try
                    {        
                         
                        int rows=iCmd.ExecuteNonQuery();
                        return rows;
                    }
                    catch(System.Exception E)
                    {                    
                        throw new Exception(E.Message);
                    }
                    finally
                    {
                        if(iConn.State != ConnectionState.Closed)
                        {
                            iConn.Close();
                        }
                    }
                }                
            }
        }
         
        /**//// <summary>
        /// 执行多条SQL语句，实现数据库事务。
        /// </summary>
        /// <param name="SQLStringList">多条SQL语句</param>        
        public  void ExecuteSqlTran(ArrayList SQLStringList)
        {
            using (System.Data.IDbConnection  iConn = this.GetConnection())
            {
                iConn.Open();
                using(System.Data.IDbCommand iCmd  =  GetCommand())
                {
                    iCmd.Connection=iConn;                
                    using(System.Data.IDbTransaction iDbTran = iConn.BeginTransaction())
                    {
                        iCmd.Transaction=iDbTran;    
                        try
                        {           
                            for(int n=0;n<SQLStringList.Count;n++)
                            {
                                string strsql = SQLStringList[n].ToString();
                                if ( strsql.Trim().Length>1) 
                                {
                                    iCmd.CommandText = strsql;
                                    iCmd.ExecuteNonQuery();
                                }
                            }                                        
                            iDbTran.Commit();                    
                        }
                        catch(System.Exception E)
                        {        
                            iDbTran.Rollback();
                            throw new Exception(E.Message);
                        }
                        finally
                        {
                            if(iConn.State != ConnectionState.Closed)
                            {
                                iConn.Close();
                            }
                        }
                    }
 
                }
 
            }
        }
        /**//// <summary>
        /// 执行带一个存储过程参数的的SQL语句。
        /// </summary>
        /// <param name="SQLString">SQL语句</param>
        /// <param name="content">参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加</param>
        /// <returns>影响的记录数</returns>
        public int ExecuteSql(string SqlString,string content)
        {                
            using (System.Data.IDbConnection  iConn = this.GetConnection())
            {
                using(System.Data.IDbCommand iCmd  = GetCommand(SqlString,iConn))
                {
                    System.Data.IDataParameter  myParameter = this.iDbPara( "@content", "Text");
                    myParameter.Value = content ;
                    iCmd.Parameters.Add(myParameter);
                    iConn.Open();
                    try
                    {
                         
                        int rows = iCmd.ExecuteNonQuery();
                        return rows;
                    }
                    catch( System.Exception e )
                    {                
                        throw new Exception(e.Message);
                    }
                    finally
                    {
                        if(iConn.State != ConnectionState.Closed)
                        {
                            iConn.Close();
                        }
                    }
                }
            }
        }        
 
 
        /**//// <summary>
        /// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)
        /// </summary>
        /// <param name="strSQL">SQL语句</param>
        /// <param name="fs">图像字节,数据库的字段类型为image的情况</param>
        /// <returns>影响的记录数</returns>
        public int ExecuteSqlInsertImg(string SqlString,byte[] fs)
        {        
            using (System.Data.IDbConnection  iConn = this.GetConnection())
            {
                using(System.Data.IDbCommand iCmd  = GetCommand(SqlString,iConn))
                {
                    System.Data.IDataParameter  myParameter = this.iDbPara( "@content", "Image");
                    myParameter.Value = fs ;
                    iCmd.Parameters.Add(myParameter);
                    iConn.Open();
                    try
                    {
                        int rows = iCmd.ExecuteNonQuery();
                        return rows;
                    }
                    catch( System.Exception e )
                    {                
                        throw new Exception(e.Message);
                    }
                    finally
                    {
                        if(iConn.State != ConnectionState.Closed)
                        {
                            iConn.Close();
                        }
                    }
                }    
            }
        }
         
        /**//// <summary>
        /// 执行一条计算查询结果语句，返回查询结果（object）。
        /// </summary>
        /// <param name="SQLString">计算查询结果语句</param>
        /// <returns>查询结果（object）</returns>
        public  object GetSingle(string SqlString)
        {
            using (System.Data.IDbConnection  iConn = GetConnection())
            {
                using (System.Data.IDbCommand iCmd  =  GetCommand(SqlString,iConn))
                {
                    iConn.Open();
                    try
                    {
                        object obj = iCmd.ExecuteScalar();
                        if((Object.Equals(obj,null))||(Object.Equals(obj,System.DBNull.Value)))
                        {                    
                            return null;
                        }
                        else
                        {
                            return obj;
                        }                
                    }
                    catch(System.Exception e)
                    {                        
                        throw new Exception(e.Message);
                    }    
                    finally
                    {
                        if(iConn.State != ConnectionState.Closed)
                        {
                            iConn.Close();
                        }
                    }
                }
            }
        }
        /**//// <summary>
        /// 执行查询语句，返回IDataAdapter
        /// </summary>
        /// <param name="strSQL">查询语句</param>
        /// <returns>IDataAdapter</returns>
        public IDataAdapter ExecuteReader(string strSQL)
        {
            using (System.Data.IDbConnection  iConn = this.GetConnection())    
            {
                iConn.Open();    
                try
                {    
                    System.Data.IDataAdapter iAdapter = this.GetAdapater(strSQL,iConn);
                    return iAdapter;
                }
                catch(System.Exception e)
                {                                
                    throw new Exception(e.Message);
                }        
                finally
                {
                    if(iConn.State != ConnectionState.Closed)
                    {
                        iConn.Close();
                    }
                }    
            }
        }        
        /**//// <summary>
        /// 执行查询语句，返回DataSet
        /// </summary>
        /// <param name="SQLString">查询语句</param>
        /// <returns>DataSet</returns>
        public DataSet Query(string sqlString)
        {
            using (System.Data.IDbConnection  iConn = this.GetConnection())    
            {    
                using(System.Data.IDbCommand iCmd  =  GetCommand(sqlString,iConn))
                {
                    DataSet ds = new DataSet();
                    iConn.Open();    
                    try
                    {
                        System.Data.IDataAdapter iAdapter = this.GetAdapater(sqlString,iConn);
                        iAdapter.Fill(ds);
                        return ds;
                    }
                    catch(System.Exception ex)
                    {                
                        throw new Exception(ex.Message);
                    }
                    finally
                    {
                        if(iConn.State != ConnectionState.Closed)
                        {
                            iConn.Close();
                        }
                    }
                }
            }            
        }
 
        /**//// <summary>
        /// 执行查询语句，返回DataSet
        /// </summary>
        /// <param name="sqlString">查询语句</param>
        /// <param name="dataSet">要填充的DataSet</param>
        /// <param name="tableName">要填充的表名</param>
        /// <returns>DataSet</returns>
        public DataSet Query(string sqlString,DataSet dataSet,string tableName)
        {
            using (System.Data.IDbConnection  iConn = this.GetConnection())    
            {    
                using(System.Data.IDbCommand iCmd  =  GetCommand(sqlString,iConn))
                {
                    iConn.Open();    
                    try
                    {
                        System.Data.IDataAdapter iAdapter = this.GetAdapater(sqlString,iConn);
                        ((OleDbDataAdapter)iAdapter).Fill(dataSet,tableName);
                        return dataSet;
                    }
                    catch(System.Exception ex)
                    {                
                        throw new Exception(ex.Message);
                    }
                    finally
                    {
                        if(iConn.State != ConnectionState.Closed)
                        {
                            iConn.Close();
                        }
                    }
                }    
            }            
        }
 
 
        /**//// <summary>
        /// 执行SQL语句 返回存储过程
        /// </summary>
        /// <param name="sqlString">Sql语句</param>
        /// <param name="dataSet">要填充的DataSet</param>
        /// <param name="startIndex">开始记录</param>
        /// <param name="pageSize">页面记录大小</param>
        /// <param name="tableName">表名称</param>
        /// <returns>DataSet</returns>
        public DataSet Query(string sqlString , DataSet dataSet ,int  startIndex ,int pageSize, string tableName )
        {
            using (System.Data.IDbConnection iConn = this.GetConnection())
            {                    
                iConn.Open();
                try
                {
                    System.Data.IDataAdapter iAdapter = this.GetAdapater(sqlString,iConn);
 
                    ((OleDbDataAdapter)iAdapter).Fill(dataSet,startIndex,pageSize,tableName);        
         
                    return dataSet;
                }
                catch(Exception ex)
                {
                    throw new Exception(ex.Message);
                }
                finally
                {
                    if(iConn.State != ConnectionState.Closed)
                    {
                        iConn.Close();
                    }
                }
            }
        }
 
 
        /**//// <summary>
        /// 执行查询语句，向XML文件写入数据
        /// </summary>
        /// <param name="sqlString">查询语句</param>
        /// <param name="xmlPath">XML文件路径</param>
        public void WriteToXml(string sqlString,string xmlPath)
        {
            Query(sqlString).WriteXml(xmlPath);
        }
 
        /**//// <summary>
        /// 执行查询语句
        /// </summary>
        /// <param name="SqlString">查询语句</param>
        /// <returns>DataTable </returns>
        public DataTable ExecuteQuery(string sqlString)
        {
            using (System.Data.IDbConnection  iConn = this.GetConnection())    
            {    
                //System.Data.IDbCommand iCmd  =  GetCommand(sqlString,iConn);
                DataSet ds = new DataSet();
                try
                {
                    System.Data.IDataAdapter iAdapter = this.GetAdapater(sqlString,iConn);            
                    iAdapter.Fill(ds);
                }
                catch(System.Exception e)
                {                
                    throw new Exception(e.Message);
                }    
                finally
                {
                    if(iConn.State != ConnectionState.Closed)
                    {
                        iConn.Close();
                    }
                }
                return ds.Tables[0];
            }
        }
 
        /**//// <summary>
        /// 执行查询语句
        /// </summary>
        /// <param name="SqlString">查询语句</param>
        /// <returns>DataTable </returns>
        public DataTable ExecuteQuery(string SqlString,string Proc)
        {
            using (System.Data.IDbConnection  iConn = this.GetConnection())    
            {    
                using(System.Data.IDbCommand iCmd  =  GetCommand(SqlString,iConn))
                {
                    iCmd.CommandType = CommandType.StoredProcedure;
                    DataSet ds = new DataSet();
                    try
                    {
                        System.Data.IDataAdapter iDataAdapter = this.GetAdapater(SqlString,iConn);            
                        iDataAdapter.Fill(ds);
                    }
                    catch(System.Exception e)
                    {                
                        throw new Exception(e.Message);
                    }    
                    finally
                    {
                        if(iConn.State != ConnectionState.Closed)
                        {
                            iConn.Close();
                        }
                    }
                    return ds.Tables[0];
                }
         
                 
            }
        }
 
        /**//// <summary>
        /// 
        /// </summary>
        /// <param name="Sql"></param>
        /// <returns></returns>
        public DataView ExeceuteDataView(string Sql)
        {
            using (System.Data.IDbConnection  iConn = this.GetConnection())    
            {    
                using(System.Data.IDbCommand iCmd  =  GetCommand(Sql,iConn))
                {
                    DataSet ds = new DataSet();
                    try
                    {
                        System.Data.IDataAdapter iDataAdapter = this.GetAdapater(Sql,iConn);            
                        iDataAdapter.Fill(ds);
                        return ds.Tables[0].DefaultView;
                    }
                    catch(System.Exception e)
                    {                
                        throw new Exception(e.Message);
                    }    
                    finally
                    {
                        if(iConn.State != ConnectionState.Closed)
                        {
                            iConn.Close();
                        }
                    }
                }    
            }
        }
 
        #endregion
 
        #region 执行带参数的SQL语句
        /**//// <summary>
        /// 执行SQL语句，返回影响的记录数
        /// </summary>
        /// <param name="SQLString">SQL语句</param>
        /// <returns>影响的记录数</returns>
        public  int ExecuteSql(string SQLString,params IDataParameter[] iParms)
        {
            using (System.Data.IDbConnection  iConn = this.GetConnection())    
            {    
                System.Data.IDbCommand iCmd  =  GetCommand();
                {
                    try
                    {        
                        PrepareCommand(out iCmd, iConn, null , SQLString, iParms );
                        int rows=iCmd.ExecuteNonQuery();
                        iCmd.Parameters.Clear();
                        return rows;
                    }
                    catch(System.Exception E)
                    {                
                        throw new Exception( E.Message );
                    }
                    finally
                    {
                        iCmd.Dispose();
                        if(iConn.State != ConnectionState.Closed)
                        {
                            iConn.Close();
                        }
                    }
                }                
            }
        }
         
             
        /**//// <summary>
        /// 执行多条SQL语句，实现数据库事务。
        /// </summary>
        /// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的SqlParameter[]）</param>
        public void ExecuteSqlTran(Hashtable SQLStringList)
        {            
            using (System.Data.IDbConnection  iConn = this.GetConnection())    
            {
                iConn.Open();
                using (IDbTransaction  iTrans = iConn.BeginTransaction()) 
                {
                    System.Data.IDbCommand iCmd  =  GetCommand();
                    try
                    {
                        //循环
                        foreach ( DictionaryEntry myDE in SQLStringList)
                        {    
                            string     cmdText = myDE.Key.ToString();
                            IDataParameter[] iParms=( IDataParameter[] ) myDE.Value;
                            PrepareCommand( out iCmd , iConn , iTrans , cmdText , iParms );
                            int val = iCmd.ExecuteNonQuery();
                            iCmd.Parameters.Clear();
                        }
                        iTrans.Commit();                
                    }
                    catch
                    {
                        iTrans.Rollback();
                        throw;
                    }
                    finally
                    {
                        iCmd.Dispose();
                        if(iConn.State != ConnectionState.Closed)
                        {
                            iConn.Close();
                        }
                    }
 
                }                
            }
        }
     
                 
        /**//// <summary>
        /// 执行一条计算查询结果语句，返回查询结果（object）。
        /// </summary>
        /// <param name="SQLString">计算查询结果语句</param>
        /// <returns>查询结果（object）</returns>
        public object GetSingle(string SQLString,params IDataParameter[] iParms)
        {
            using (System.Data.IDbConnection  iConn = this.GetConnection())    
            {
                System.Data.IDbCommand iCmd  =  GetCommand();    
                {
                    try
                    {
                        PrepareCommand( out iCmd, iConn, null , SQLString, iParms );
                        object obj = iCmd.ExecuteScalar();
                        iCmd.Parameters.Clear();
                        if((Object.Equals(obj,null))||(Object.Equals(obj,System.DBNull.Value)))
                        {                    
                            return null;
                        }
                        else
                        {
                            return obj;
                        }                
                    }
                    catch(System.Exception e)
                    {                
                        throw new Exception(e.Message);
                    }
                    finally
                    {
                        iCmd.Dispose();
                        if(iConn.State != ConnectionState.Closed)
                        {
                            iConn.Close();
                        }
                    }
                }
            }
        }
         
        /**//// <summary>
        /// 执行查询语句，返回IDataReader
        /// </summary>
        /// <param name="strSQL">查询语句</param>
        /// <returns> IDataReader </returns>
        public IDataReader ExecuteReader(string SQLString,params IDataParameter[] iParms)
        {        
            System.Data.IDbConnection  iConn = this.GetConnection();
            {
                System.Data.IDbCommand iCmd  =  GetCommand();
                {
                    try
                    {
                        PrepareCommand(out iCmd, iConn , null , SQLString , iParms);
                        System.Data.IDataReader iReader = iCmd.ExecuteReader();
                        iCmd.Parameters.Clear();
                        return iReader;
                    }
                    catch(System.Exception e)
                    {                                
                        throw new Exception(e.Message);
                    }        
                    finally
                    {
                        iCmd.Dispose();
                        if(iConn.State != ConnectionState.Closed)
                        {
                            iConn.Close();
                        }
                    }            
                }
            }    
        }        
         
        /**//// <summary>
        /// 执行查询语句，返回DataSet
        /// </summary>
        /// <param name="SQLString">查询语句</param>
        /// <returns>DataSet</returns>
        public DataSet Query(string sqlString,params IDataParameter[] iParms)
        {
            using (System.Data.IDbConnection  iConn = this.GetConnection())    
            {
                IDbCommand iCmd = GetCommand();
                {
                    PrepareCommand(out iCmd , iConn , null , sqlString , iParms );
                    try
                    {    
                        IDataAdapter iAdapter =  this.GetAdapater(sqlString,iConn);
                        DataSet ds = new DataSet();                                                
                        iAdapter.Fill(ds);
                        iCmd.Parameters.Clear();
                        return ds;
                    }
                    catch(System.Exception ex)
                    {                
                        throw new Exception(ex.Message);
                    }
                    finally
                    {
                        iCmd.Dispose();
                        if(iConn.State != ConnectionState.Closed)
                        {
                            iConn.Close();
                        }
                    }
                }    
            }
        }
         
         
        /**//// <summary>
        /// 初始化Command
        /// </summary>
        /// <param name="iCmd"></param>
        /// <param name="iConn"></param>
        /// <param name="iTrans"></param>
        /// <param name="cmdText"></param>
        /// <param name="iParms"></param>
        private void PrepareCommand(out IDbCommand iCmd,IDbConnection iConn,System.Data.IDbTransaction iTrans, string cmdText, IDataParameter[] iParms) 
        {
            if (iConn.State != ConnectionState.Open)
                iConn.Open();
            iCmd = this.GetCommand();
            iCmd.Connection =  iConn;
            iCmd.CommandText = cmdText;
            if (iTrans != null)
                iCmd.Transaction = iTrans;
            iCmd.CommandType = CommandType.Text;//cmdType;
            if (iParms != null) 
            {
                foreach (IDataParameter parm in iParms)
                    iCmd.Parameters.Add(parm);
            }
        }
 
        #endregion
 
        #region 存储过程操作
 
        /**//// <summary>
        /// 执行存储过程
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="parameters">存储过程参数</param>
        /// <returns>SqlDataReader</returns>
        public SqlDataReader RunProcedure(string storedProcName, IDataParameter[] parameters )
        {
            System.Data.IDbConnection  iConn = this.GetConnection();
            {
                iConn.Open();
                 
                using(SqlCommand sqlCmd = BuildQueryCommand(iConn,storedProcName, parameters))
                {
                    return  sqlCmd.ExecuteReader(CommandBehavior.CloseConnection);    
                }
            }
        }
 
        /**//// <summary>
        /// 执行存储过程
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="parameters">存储过程参数</param>
        /// <param name="tableName">DataSet结果中的表名</param>
        /// <returns>DataSet</returns>
        public  DataSet RunProcedure(string storedProcName, IDataParameter[] parameters ,string tableName)
        {
 
            using (System.Data.IDbConnection   iConn = this.GetConnection())    
            {
                DataSet dataSet = new DataSet();
                iConn.Open();
                System.Data.IDataAdapter iDA = this.GetAdapater();
                iDA = this.GetAdapater( BuildQueryCommand(iConn, storedProcName, parameters ) );
 
                ((SqlDataAdapter)iDA).Fill( dataSet,tableName);
                if(iConn.State != ConnectionState.Closed)
                {
                    iConn.Close();
                }
                return dataSet;
            }
        }
 
 
 
        /**//// <summary>
        /// 执行存储过程
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="parameters">存储过程参数</param>
        /// <param name="tableName">DataSet结果中的表名</param>
        /// <param name="startIndex">开始记录索引</param>
        /// <param name="pageSize">页面记录大小</param>
        /// <returns>DataSet</returns>
        public  DataSet RunProcedure(string storedProcName, IDataParameter[] parameters ,int startIndex,int pageSize,string tableName)
        {
 
            using (System.Data.IDbConnection   iConn = this.GetConnection())    
            {
                DataSet dataSet = new DataSet();
                iConn.Open();
                System.Data.IDataAdapter iDA = this.GetAdapater();
                iDA = this.GetAdapater( BuildQueryCommand(iConn, storedProcName, parameters ) );
 
                ((SqlDataAdapter)iDA).Fill( dataSet,startIndex,pageSize,tableName);
                if(iConn.State != ConnectionState.Closed)
                {
                    iConn.Close();
                }
                return dataSet;
            }
        }
 
        /**//// <summary>
        /// 执行存储过程 填充已经存在的DataSet数据集 
        /// </summary>
        /// <param name="storeProcName">存储过程名称</param>
        /// <param name="parameters">存储过程参数</param>
        /// <param name="dataSet">要填充的数据集</param>
        /// <param name="tablename">要填充的表名</param>
        /// <returns></returns>
        public DataSet RunProcedure(string storeProcName,IDataParameter[] parameters,DataSet dataSet,string tableName)
        {
            using (System.Data.IDbConnection iConn = this.GetConnection())
            {
                iConn.Open();
                System.Data.IDataAdapter iDA = this.GetAdapater();
                iDA = this.GetAdapater(BuildQueryCommand(iConn,storeProcName,parameters));
                 
                ((SqlDataAdapter)iDA).Fill(dataSet,tableName);
                 
                if(iConn.State != ConnectionState.Closed)
                {
                    iConn.Close();
                }
 
                return dataSet;
            }
        }
 
        /**//// <summary>
        /// 执行存储过程并返回受影响的行数
        /// </summary>
        /// <param name="storedProcName"></param>
        /// <param name="parameters"></param>
        /// <returns></returns>
        public int RunProcedureNoQuery(string storedProcName, IDataParameter[] parameters )
        {
 
            int result = 0;
            using (System.Data.IDbConnection  iConn = this.GetConnection())    
            {
                iConn.Open();
                using(SqlCommand scmd = BuildQueryCommand(iConn,storedProcName,parameters))
                {
                    result = scmd.ExecuteNonQuery();
                }    
 
                if(iConn.State != ConnectionState.Closed)
                {
                    iConn.Close();
                }
            }
 
            return result ;
        }
 
        public string RunProcedureExecuteScalar(string storeProcName,IDataParameter[] parameters)
        {
            string result = string.Empty;
            using (System.Data.IDbConnection iConn = this.GetConnection())
            {
                 
                iConn.Open();
                using(SqlCommand scmd = BuildQueryCommand(iConn,storeProcName,parameters))
                {
                    object obj = scmd.ExecuteScalar();
                    if(obj == null)
                        result = null;
                    else
                        result = obj.ToString();
                }
 
                if(iConn.State != ConnectionState.Closed)
                {
                    iConn.Close();
                }
 
            }
 
            return result;
        }
         
        /**//// <summary>
        /// 构建 SqlCommand 对象(用来返回一个结果集，而不是一个整数值)
        /// </summary>
        /// <param name="connection">数据库连接</param>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="parameters">存储过程参数</param>
        /// <returns>SqlCommand</returns>
        private SqlCommand BuildQueryCommand(IDbConnection iConn,string storedProcName, IDataParameter[] parameters)
        {            
             
            IDbCommand iCmd = GetCommand(storedProcName,iConn);
            iCmd.CommandType = CommandType.StoredProcedure;
            if (parameters == null)
            {
                return (SqlCommand)iCmd;
            }
            foreach (IDataParameter parameter in parameters)
            {
                iCmd.Parameters.Add( parameter );
            }
            return (SqlCommand)iCmd;            
        }
         
        /**//// <summary>
        /// 执行存储过程，返回影响的行数        
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="parameters">存储过程参数</param>
        /// <param name="rowsAffected">影响的行数</param>
        /// <returns></returns>
        public int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected )
        {
            using (System.Data.IDbConnection  iConn = this.GetConnection())    
            {
                int result;
                iConn.Open();
                using(SqlCommand sqlCmd = BuildIntCommand(iConn,storedProcName, parameters ))
                {
                    rowsAffected = sqlCmd.ExecuteNonQuery();
                    result = (int)sqlCmd.Parameters["ReturnValue"].Value;
 
                    if(iConn.State != ConnectionState.Closed)
                    {
                        iConn.Close();
                    }
                    return result;                
                }
            }
        }
         
        /**//// <summary>
        /// 创建 SqlCommand 对象实例(用来返回一个整数值)    
        /// </summary>
        /// <param name="storedProcName">存储过程名</param>
        /// <param name="parameters">存储过程参数</param>
        /// <returns>SqlCommand 对象实例</returns>
        private SqlCommand BuildIntCommand(IDbConnection iConn,string storedProcName, IDataParameter[] parameters)
        {
            SqlCommand sqlCmd = BuildQueryCommand(iConn,storedProcName, parameters );
            sqlCmd.Parameters.Add( new SqlParameter ( "ReturnValue",
                SqlDbType.Int,4,ParameterDirection.ReturnValue,
                false,0,0,string.Empty,DataRowVersion.Default,null ));
            return sqlCmd;
        }
        #endregion    
 
 
    }
}